import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        while (sc.hasNext()){
            int n= sc.nextInt();
            if (n ==0)
                break;
            int count=0;
            while (n>=2){
                n/=3;
                count++;
            }
            System.out.println(count);
        }
    }
}
